Top 10 Most Expensive Heating Mistakes You’re Making In

July 5, 2025

With energy prices set to rise again this financial year – following the Australian Energy Regulator’s decision to lift electricity price caps – many households across the Gold Coast and beyond are facing the reality of higher heating bills this winter.

At DEEPCHILL, we believe saving on heating starts with knowing what not to do. We’ve teamed up with insights from CHOICE home heating expert Chris Barnes, to walk you through the most common heating mistakes that could be blowing out your bills and what you can do instead.

A person adjusting a smart thermostat, possibly making common heating mistakes by setting temperatures inefficiently.

1. Believing expensive = Better

One of heating mistakes is when many people assume that pricier heaters or air conditioners must perform better – but that’s not always the case. According to CHOICE testing, some of the most expensive electric heaters performed poorly, while some lower-cost options (under $100) delivered surprisingly efficient results.

✅ DEEPCHILL tip: Before buying a unit, check independent reviews or consult an HVAC expert. Price doesn’t always reflect performance.

2. Ignoring running costs

Buying cheap can be expensive in the long run. In CHOICE testing, running costs for heaters over one winter varied by more than $300 – depending on size, design, and efficiency.

✅ DEEPCHILL tip: Always check the energy rating label and estimated yearly running cost before buying. Need help calculating what’s best for your space? Just ask us – we do this every day for our Gold Coast customers.

3. Not using your ceiling fan in reverse

Hot air rises – which means it collects up high where it does you no good. Switching your ceiling fan to reverse mode (clockwise in winter) helps push warm air back down into the room, allowing your heater or air conditioner to work more efficiently.

✅ DEEPCHILL tip: Use your reverse-cycle AC with a ceiling fan for optimal heat distribution. It’s one of the simplest air conditioning tips and tricks for winter.

4. Not using your air conditioner for heating

Think air conditioning is just for summer? That’s is one of heating mistakes you rarely realize. Reverse-cycle air conditioners are one of the most efficient heating methods available, often cheaper to run than electric heaters over time.

✅ DEEPCHILL tip: If you already have a reverse-cycle unit, use it for heating. And if you’re considering an upgrade, we can help you choose a model that suits your space and budget.

5. Cranking up the thermostat

Every extra degree can add around 10% to your heating bill. Experts recommend setting your air conditioner around 8°C above the outdoor temperature for the most efficient performance.

✅ DEEPCHILL tip: Instead of setting your air con to 26°C, try 21–22°C and layer up with clothing or blankets. Small changes make a big difference over winter.

Finger pressing a button on a wall thermostat, which can lead to heating mistakes if not programmed correctly.

6. Skipping maintenance

Dusty filters and clogged internal parts force your system to work harder – which burns more power. Regular cleaning and maintenance can significantly improve efficiency.

✅ DEEPCHILL tip: Clean filters every 1–2 months during high-use seasons. Better yet, book a professional service – DEEPCHILL offer tailored air conditioning maintenance for Gold Coast homes and businesses.

7. Drying clothes on or in front of your heater

It might feel cosy, but drying clothes this way restricts airflow and causes your unit to overwork. It’s also a fire hazard.

✅ DEEPCHILL tip: Dry laundry in a well-ventilated room instead. Don’t block vents or drape anything over heaters or indoor air con units.

8. Ignoring draughts

Even the best heater struggles when cold air seeps in through gaps under doors and windows. According to CHOICE, sealing draughts can significantly cut energy loss.

✅ DEEPCHILL tip: Use weather seal tape, door snakes, or silicone sealant to close up gaps. Don’t forget to check floorboards, too.

9. Forgetting about insulation

Did you know that 25–35% of your home’s heat could be escaping through the roof if it’s uninsulated? That’s money literally flying out the ceiling.

✅ DEEPCHILL tip: If your home doesn’t have ceiling or underfloor insulation, now is the time. We can connect you with trusted local partners for insulation upgrades.

10. Not budgeting for higher bills

Energy prices are rising. Even with the Energy Bill Relief Fund offering rebates up to $150 for eligible households from July 2025, bills can still creep up fast if your heating use is inefficient.

✅ DEEPCHILL Tip: Review your usage weekly, and budget for an extra buffer in winter. Using an efficient system + smart habits = lower surprise bills.

Category: Tips & Tricks

Related Posts

Couple adjusting remote to fix autumn comfort problems at home, addressing what is the common problem with an air conditioner in fall, air conditioning Gold Coast.
Tips & Tricks
Autumn Comfort Problems Most Gold Coast Homes Don’t Notice
During this season on the Gold Coast, humidity often sitting between 60% – 80%, moisture builds up quietly inside homes....
Family relaxing under split system to use air conditioning efficiently in autumn, showing how to use air conditioning in autumn to stay comfortable and save energy in air conditioning Gold Coast homes.
Tips & Tricks
Use Air Conditioning In Autumn To Save Energy?
Autumn can be confusing. One minute it feels warm and sticky, the next it turns cool and breezy. So how...
Hand holding remote control adjusting indoor split system – temperature to set air conditioner in fall for comfortable air conditioning Gold Coast homes.
Tips & Tricks
What Temperature To Set Air Conditioner In Fall
When the heat starts to ease but the air still feels a little warm in the afternoon, many homeowners ask...
Woman turning off air conditioner with remote in living room, preparing for Turning Off Your Air Conditioner For Fall in Gold Coast climate.
Tips & Tricks
Four Things To Do Before Turning Off Air Conditioner For Fall
Fall is rolling in. Let’s find out what to do before turning off air conditioner for fall with DEEPCHILL, your...
Homeowner relaxing under a wall-mounted air conditioner during summer, highlighting what to consider before replacing an AC in heatwave conditions.
Tips & Tricks
Before Replacing Your Air Conditioner, Consider This
During extreme summer heat, many Gold Coast homeowners only realise something is wrong after their air conditioning system starts struggling....
Man using a remote to adjust wall-mounted air conditioner during summer to save power with efficient air conditioning Gold Coast setup.
Tips & Tricks
Summer AC Myths That Don’t Actually Save Power
When summer hits hard Gold Coast, most people turn to their air conditioning systems instinctively. Some habits feel energy-saving. Others...